Hi, not sure how much I can talk about my problem on the forum but here goes, I have a dm800hd (clone) in my bedroom with sub card which I use for watching hd channels as my original box wasn't hd ,this works fine with no issues, I also have a spider box and an open box in a further 2 rooms which connect to the dm800hd (clone) (-if you know what I mean - ) via homeplugs ,my problem is that only 1 of the other boxes (spider box or open box) will clear when both boxes are on,but each box will work fine when the other box is powered off. This is internally only and I set the boxes up for myself,which I am still very much learning. Any help would be appreciated